4,264
4.3K
Mar 12, 2013
03/13
Mar 12, 2013
by
Abramowitz, Milton (editor); Stegun, Irena A. (editor)
4,264
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1
"Trivia question: What is the most cited work in the mathematical literature? With an estimated 40,000 citations, the Handbook of Mathematical Functions may well be it. Edited by Milton Abramowitz and Irene Stegun and released by the National Bureau of Standards in 1964, the Handbook was the result of a tenyear project to compile essential information on the special functions of applied mathematics (e.g., Bessel functions, hypergeometric functions, and orthogonal polynomials) for use in...
( 1 reviews )
Topics: Functions, MathematicsTables
Topic: Microwave measurements.
The passage from electrical superconductivity to normal conductivity of metals at low temperatures may be attained with a critical current density or by the application of a critical magnetic field. The author regards these two means as interdependent. In a previous paper the case of a wire conveying a current was treated and the magnetic field resulting was such as to give rise to a central superconducting core with an outer resisting layer. This condition is unstable. The present note...
Topics: electrical conductivity, temperatures (high and low), Condensed matter, electronic structure,...
The luminosity of a radiator is defined as the integral from O to infinity with respect to lambda of the product of visibility (V) and energy (J) of the radiating source, /b i,e./ int /sub 0//sup infinity / VJ/b d/ lambda V = /b f/( lambda ) is given by the experimental determinations of Ives, Nutting, and Hyde and Forsythe, and J = /b c/sub 1// lambda /sup 5//b e//sup c//sub 2//sup lambda thetas / (Wien's law). The effective wavelength lambda L of the luminosity has been defined...
Topics: photometry, rays and radiation, temperature, Heat flow, thermal and thermodynamic processes
The substance whose thermal expansibility is required is used as a pillar to support a glass plate. The other side of the plate is supported by some standard substance, such as glass, quartz, or metal, of known expansibility. When temperature rises there is a differential expansion between the pillar and the standard substance. This expansion produces a movement of the interference fringes formed in the usual way between the glass plate and the surface of the standard. The peculiarity of the...
Topic: Low temperature research.
Journal of Research of the National Bureau of Standards
Topics: absorption spectra, aldopyranosides, glycoside, infrared, pyranoid sugar
147
147



by
Grubb, Dana S.; Cotton, Ira W.
147
0
0
Topics: Telecommunication., Computer networks.
This paper discusses the arc spectra and critical potentials of arsenic, antimony, and bismuth, revised values of the critical potentials being given, while information on the spectrum of singly ionised nitrogen and the various spark spectra of bismuth is included. The resonance potentials of the neutral atoms are found to correspond to the mean excitation voltages of groups of spectra lines. Photographs of the thermionic discharge in bismuth were used to separate the excitation stages of the...
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by
Hamilton, C. A.; Day, G. W.; Phelan, Jr., R. J.
54
0
0
Journal of Research of the National Bureau of Standards
The method consists in producing simultaneously on a moving photographic film a record of the occurrence of the events under consideration and timing lines from a tuning fork acting as a shutter. This shutter consists of two opaque vanes, in which narrow slits have been cut, mounted on the prongs of a tuning fork, so that the slits are parallel to the axis of the fork, and coincide when the fork is at rest. When the fork vibrates the two slits will coincide twice during each complete period of...
This paper deals with (our instruments for measuring radiant energy, viz,, the radiomicrometer, the linear thermopile, the radiometer, and the bolometer, with its auxiliary galvanometer. The radiomicrometer is capable of great improvement, by reducing its weight, by lengthening its period, and by placing it in a vacuum. On account of para and diamagnetism the sensitiveness of the radiomicrometer is very limited, being perhaps only a fifth of that of the best bolometers described. The...
Topics: measurements and use of instruments, thermometry, pyrometry and calorimetry, Heat flow, thermal and...
92
92



by
Pottasch, Stuart R. (Stuart Robert), 1932
92
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0
40
40



by
Slater, James A.
40
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0
Topics: Children's sleepwearTesting., Fire testing.
In a previous paper Middlekauff and Skogland derived characteristic equations for the performance of tungsten lamps in terms of the applied voltage. These results are now applied to the construction of a chart by means of which, if the watts per c.p. are known at any voltage, the c.p. and the watts per c.p, at any other voltage may be read off directly. A chart is given which has a range of voltage of 94 to 166 volts, and a range of watts per c.p. of 0.70 to 2.05. Tables of figures drawn up by...
Topic: lamps and lighting/ B8530B Light sources
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by
Cateora, J. V.; Hanson, D. W.; Davis, D. D.
33
0
0
A method of high accuracy has been developed far the primary standardisation of radio frequency. Comparison is made between a tuningfork of accurately known frequency with an electrontube drive and a generating set of radiofrequency current by the use of two radiofrequency generating sets and Lissajous figures produced in a kathaderay oscillograph. The apparatus used in this work consisted of a Bureau of Standards type R70B wavemeter which has a variable air condenser, 4 fixed mica...
Journal of Research of the National Bureau of Standards
Topics: Infrared detectorsDefects., Microwave detectorsDefects.
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48



by
Popenoe, Charles H.; Thompson, Robert C.
48
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Equipment auxiliary to, and simple modifications of a teletypewriter are described which enable it to be used more efficiently as a remote console of a computer.The descriptions and drawings are sufficiently detailed to enable one to duplicate the modific
Topics: Teletype., Timesharing computer systems.
Journal of Research of the National Bureau of Standards
Journal of Research of the National Bureau of Standards
117
117



by
Reed, R. P. (Richard Palmer), 1934
117
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0
Journal of Research of the National Bureau of Standards
Journal of Research of the National Bureau of Standards
Topic: Conference Report
39
39



by
Chwirut, Daniel J.; Sushinsky, George F.
39
0
0
Topics: Aluminum alloys., Epoxy compounds.
An exact formula for the mutual inductance of coaxial circles was derived by Maxwell in terms of elliptic integrals, but this does not readily lend itself to computation either when the coils are close together or far apart. For the latter purpose a large number of series formulae have been developed, and the present paper deals with a simplified method for expressing the mutual inductance of coaxial circles either in terms of the radii of the circles and the distance between them, or in terms...
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by
Young, M.; Lawton, R. A.
38
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0
35
35



by
Young, William F.; Remley, Kate A.; Matolak, David W.; Zhang, Qian; Holloway, Christopher L.; Grosvenor, Chriss; Gentile, Camillo; Koepke, Galen; Wu, Qiong.
35
0
0
Topics: Radio wavesAttenuation., Wireless communication systemsMeasurement., Incident command systems.,...
Journal of Research of the National Bureau of Standards
Journal of Research of the National Bureau of Standards
Journal of Research of the National Bureau of Standards
Topics: Measurement, peak, pulse, pulselimiting, slideback, standard, voltage
Topics: Fluid mechanicsMeasurement., Fluid dynamic measurements., Automatic data collection systems.
Journal of Research of the National Bureau of Standards
65
65



by
Andrews, J. R. (James Rowland), 1941; Bell, B. A.; Baldwin, E. E.
65
0
0
Topic: Pulse generatorsMathematical models.
Journal of Research of the National Bureau of Standards
71
71



by
Chilton, C. J.; Steele, F.K.; Crombie, D.D.
71
0
0
Topic: Sporadic E (Ionosphere)
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56



by
Pontius, Paul E.
56
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The Pilot Program for mass measurement is the result of a consideration in which the values produced are thought of as the products of a mass measurement process.The collective performance of elements of the mass measurement process results in establishin
Topics: Standards of mass., Physical measurements., Uncertainty (Information theory)
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39



by
Mielenz, K. D.; Eckerle, K. L.
39
0
0